<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>my css4</title>
    <style>
        span {
            display: block;
            background-color: orangered;
            height: 30px;
        }
        .c1 {
            background-color: #2aabd2;
        }
        .c2 {
            background-color: #c8e5bc;
        }
        .c1, .c2 {
            float: left;
            width: 500px;
        }
        .container {
            width: 1000px;
        }
    </style>
</head>
<body>
<div class="container">
    <div class="c1">1111</div>
    <div class="c2">2222</div>
</div>
<!--
<span>达内云计算 Cloud Computing</span>
<span>达内云计算 Cloud Computing</span>
-->
</body>
</html>